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Arrange the following set of compounds in order of increasing boiling points(i) Bromomethane, Bromoform, Chloromethane, Dibromomethane(ii) 1-Chloropropane, Isopropylchloride,1-Chlorobutane. |
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Answer» Solution :The boiling points of the compound depends on : (i) van DAR Waal.s FORCES (ii) Dipole-Dipole interactions The strength of these molecular forces depend on : (i) Molacular Mass of the compound (ii) Surface area of the compound Boiling point INCREASES with the increase in contact surface area and molecular mass of the molecule. Therefore, the correct order is : CHLOROMETHANE `LT` Bromomethane `lt` Dibromomethane `lt` Bromoform The branched compounds have lower surface area and thus boiling points get lowered. Isopropyl chloride `lt` 1-chloropropane `lt` 1-chlorobutane |
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